FILLING:
Beat with electric mixer cream cheese, sour cream, eggs, butter, cornstarch, sugar and vanilla. When the filling is perfectly smooth and creamy pour into crust. Return to 350 oven and bake 30 to 35 minutes or until a knife inserted comes out clean. Cool in pan on rack 20 minutes before releasing springform from the cake. Cool another 20 minutes before cutting. Sprinkle top with cookie crumbs.